Guide to North American Birds

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Photo: Rolf Nussbaumer/VIREO

Least Grebe

Tachybaptus dominicus

A tiny diver of the American tropics, entering our area mainly in southern Texas. Seems to fly more readily than most grebes, and may colonize temporary ponds or flooded areas shortly after they form. Often seen swimming and diving on small ponds or ditches in pursuit of aquatic insects, its main food. Sometimes the Least Grebe hides in dense marshes, where its presence may be revealed by metallic trilling calls, often given as a duet by members of a mated pair.

Conservation status	Numbers vary in limited range in United States. Many may be killed by exceptionally cold winters in Texas.
Family	Grebes
Habitat	Ponds, marshes. In Texas usually on shallow freshwater ponds and ditches, either fairly open or with heavy marsh vegetation. Often appears on small temporary ponds after rainy periods. In tropics, also on brackish marshes, lakes, slow-moving rivers, mangrove swamps.

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Feeding Behavior

Forages in several ways. Dives and swims underwater in pursuit of prey, captures insects on and above surface of water or takes them from waterside vegetation. May catch flying dragonflies by approaching them underwater and then erupting from beneath water's surface to snatch them from the air.

Eggs

4-6, rarely 3-7. Whitish to very pale blue-green, becoming stained in nest. Incubation (by both sexes) about 21 days. Young: Can swim soon after hatching. Small young often ride on parents' backs; fed by both parents. Young may return to nest for sleeping and resting during first 2 weeks after hatching. Age at first flight not known. May raise 2-3 broods per year (possibly more in tropics).

Young

Can swim soon after hatching. Small young often ride on parents' backs; fed by both parents. Young may return to nest for sleeping and resting during first 2 weeks after hatching. Age at first flight not known. May raise 2-3 broods per year (possibly more in tropics).

Diet

Mostly insects. Feeds on wide variety of insects, including aquatic beetles, waterbugs, dragonfly larvae and adults, and others. Also small crustaceans, spiders, tadpoles, small fish.

Nesting

In Texas, breeds mainly spring and summer, sometimes at other seasons; nests year-round in the tropics. Courtship displays not well known, may include pair rising to upright position and gliding rapidly across surface of water. Nest: Site is in shallow water, usually 1-3' deep. Nest (built by both sexes) is a mass of decaying vegetation, either floating or resting on bottom, anchored to aquatic plants. Same nest often re-used for subsequent broods.

Illustration © David Allen Sibley.
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Text © Kenn Kaufman, adapted from
Lives of North American Birds

Migration

Not truly migratory, but moves around considerably, sometimes appearing quickly on newly-formed ponds. Has strayed north to California, Arizona, and Louisiana. Has colonized many islands in Caribbean, and strays from Caribbean have reached Florida. Movements are probably mostly at night.

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Migration

Songs and Calls

Loud peek! and other calls.

Audio © Lang Elliott, Bob McGuire, Kevin Colver, Martyn Stewart and others.
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How Climate Change Will Reshape the Range of the Least Grebe

Audubon’s scientists have used 140 million bird observations and sophisticated climate models to project how climate change will affect this bird’s range in the future.

Zoom in to see how this species’s current range will shift, expand, and contract under increased global temperatures.

Climate threats facing the Least Grebe

Choose a temperature scenario below to see which threats will affect this species as warming increases. The same climate change-driven threats that put birds at risk will affect other wildlife and people, too.